OVERVIEW

The QS7777PF/CF is an audio processor IC which implements the QSurround™ technology developed and licensed by QSound Labs, Inc. It processes Dolby Digital (AC-3) and Dolby Surround audio signals to produce enhanced virtual 3D sounds, even for 2-speaker systems. It can generate 2, 3, 4, and 5-channel speaker configurations, all with enhanced surround signal outputs.

FEATURES

■ Enhanced surround signal from Dolby Digital (AC-3) and Dolby Surround (ProLogic) input signals

■ 2-step adjustable sound enhancement

■ Supported speaker configurations

• Dolby Digital (AC-3) 6-channel signals to 2, 3, 4, 5-channel speaker QSurround signal configurations

• Dolby Surround (ProLogic) 4-channel signals to 2, 3, 4-channel speaker QSurround signal configurations

■ Monaural to virtual stereo conversion

■ Parallel and 2 serial interface control modes selectable

• QS7777CF: I2C bus 2-wire serial interface1

• QS7777PF: 3-wire serial interface (Data, Clock,

Strobe)

■ 5 to 13V analog supply

■ 4.5 to 5.5V digital supply

■ 48-pin QFP package



APPLICATIONS

■ DVD and laser disk players

■ TV and AV equipment

■ Multimedia products (including sound cards)

■ Car audio